JPH0260425B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an atomizer device that supplies atomized release agent to the inner surface of a mold incorporated in a die-casting machine.

(Prior art and its problems) Generally, when manufacturing a die-cast product, a mold release agent (lubricant) is sprayed on the inner surface of the mold to make it easier to take out the die-cast product from the mold. At this time, the spray amount of the mold release agent may not be too large or too small. This is because the temperature of the mold changes, and especially if the amount of spray is small, the die-cast product will be baked into the mold, resulting in a defective product. Therefore, in an atomizer device, it is necessary to constantly detect the spray amount of the mold release agent, and if the spray amount is not appropriate, take measures such as stopping the operation of the device.

However, conventional atomizer devices have not been provided with a mechanism for detecting the amount of mold release agent sprayed.

(Means for solving the problem) Therefore, the applicant of the present invention considered detecting the flow rate of the mold release agent in the atomizer device, that is, the spray amount, by attaching a flow meter to the external piping for the mold release agent of the atomizer device. However, this method cannot detect cases where the mold release agent is clogged at the end of the piping, and therefore it may not be possible to reliably detect whether the amount of mold release agent sprayed is appropriate. The drawback was that the piping structure was complicated.

In order to obtain an atomizer device that can constantly and reliably detect the amount of sprayed mold release agent, the present invention provides a rotating rotor having a plurality of blades that passes through the mold release agent path in the middle of the mold release agent path in the device. The blades are provided to rotate under pressure from a mold release agent, and a rotation sensor is provided to detect the rotational speed of the rotating rotor.

(Operation) When the amount of mold release agent passing through the mold release agent passage is larger than the appropriate amount, the blades of the rotating rotor receive greater pressure than when the amount is appropriate, so the rotating rotor rotates faster than when the amount is appropriate. Conversely, if the amount is less than the appropriate amount, it will rotate slowly. Therefore, it can be determined from the rotational speed of the rotor whether the flow rate of the mold release agent, that is, the spray amount is appropriate.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. 1 is a longitudinal cross-sectional view of an atomizer device according to the present invention, FIG. 2 is a cross-sectional view taken from FIG. 1, FIG. 3 is a top view of the device, and FIG. In FIG. 1, a spray nozzle 3 is screwed into a screw hole 2 at the front of a holder 1 by a predetermined amount. The nozzle 3 includes an ejection port 4 opening at the front end surface and a cylinder 5 communicating with the ejection port 4, that is, a small diameter cylinder 5a and a large diameter cylinder 5b concentrically.

A liquid discharge nozzle 6 is fitted into the cylinder 5. The nozzle 6 includes a nozzle body 6a which has a diameter slightly smaller than that of the small-diameter cylinder 5a and whose length is slightly shorter than the length from the front end surface 50a of the cylinder 5a to the rear end surface 2a of the screw hole 2, and a nozzle body 6a which has a diameter smaller than the jet nozzle 4 and has a front end surface of the main body 6a. A protruding portion 6b formed to protrude from the side and a flange portion 6 spline-fitted to the large diameter cylinder 5b.
It consists of c. The nozzle 6 is in a state in which the flange portion 6c is spline-fitted to the large-diameter cylinder 5b, the rear end surface of the main body 6a is in close contact with the rear end surface 2a of the screw hole 2, and the front portion of the protruding portion 6b is inside the jet nozzle 4. The chamber 7 is formed in the gap between the spline teeth of the flange portion 6c (not shown), the gap between the main body 6a and the walls of the cylinders 5a and 5b, and the protrusion 6.
A gap between b and the wall of the spout 4 communicates with the spout 4 so that air can pass therethrough.

Further, the nozzle 6 is provided with a first mold release agent passage 8 at the center, and the passage 8 opens at the front end face of the protruding portion 6b and at the rear end opens at the rear end face of the main body 6a. The passage 8 communicates with the piston chamber 10 via a second mold release agent passage 9. A needle valve 11 for adjusting the release agent is provided in the middle of the passage 9.

The piston chamber 10 consists of a small diameter piston chamber 10a and a large diameter piston chamber 10b communicating with the passage 9. A piston valve 11 is fitted into the piston chamber 10. The valve 11 consists of a small diameter valve 11a that fits into a small diameter piston chamber 10a, and a large diameter valve 11b that fits into a large diameter piston chamber 10b. The diameter valve 11b is fitted into the piston chambers 10a and 10b, respectively, via an "O" ring 13 and a piston ring 14 on its outer periphery.

The valve 11 is normally compressed by a compression spring 16 compressed between the cap 15 and the small diameter valve 11.
The front end surface of the small diameter piston chamber 10a is urged forward so as to come into close contact with the front end surface of the small diameter piston chamber 10a. At this time, there is a gap 17 between the front end surface of the large diameter valve 11b and the front end surface of the large diameter piston chamber 10b. Most of the compression spring 16 is built into the valve 11. Further, a recess 11c having a diameter larger than the diameter of the passage 9 is formed in the front end surface of the small diameter valve 11a.
The cap 15 also has a ventilation hole 15c in the center.

A first air passage 22 communicating with a pressurized air electromagnetic valve 21 is opened at the front end surface on the upper side of the large diameter piston chamber 10b. Further, a second air passage 23 communicating with the chamber 7 is opened at the lower front end surface.

Reference numeral 30 denotes a top-opening rotor case having a cylindrical chamber 31, and is attached to the lower surface of the holder 1 so that the chamber 31 is sealed. A rotating rotor 32 is installed within the chamber 31. The rotor 32 has a cylindrical body 32a whose diameter is slightly smaller than the diameter of the chamber 31.
, a rotating shaft 32b at the center of the cylindrical body 32a, and a plurality of blades 32c (here, 6 blades) made of metal in the shape of a flat rectangle provided on the side wall 32d of the cylindrical body 32a at equal intervals in the circumferential direction. ing. Rotating shaft 32b
is rotatably inserted into a vertical hole 29 formed in the lower surface of the holder 1 at its upper end.

As shown in FIG. 2, the side wall 31 of the chamber 31
Gap 35 between a and the side wall 32d of the cylindrical body 32a
are divided into independent spaces by blades 32c. A sensor 33 is attached to a predetermined location on the side wall 31a of the chamber 31 to count the number of blades 32c passing through that location as the rotor 32 rotates. The sensor 33 counts the number of blades 32c that pass in front of the blade 32c, for example, by blocking the light emitted from the tip by the blade 32c.

Further, third mold release agent passages 2 are provided on the side wall 31a of the chamber 31, facing positions on both sides with the sensor 33 in between.
5. One end of each of the fourth mold release agent passages 26 is open. The distance between the openings is longer than the distance between the tips of adjacent blades 32c of the rotor 32. The other end of the passage 25 is the small diameter piston chamber 1.
The opening 25a is opened in the front side wall of the valve 0a, and this opening 25a is normally closed by the small diameter valve 11a. In addition, the passage 26 is connected to the mold release agent solenoid valve 2.
7 (Figure 3). The strength of the compression spring 16 is set so that when pressurized air is introduced into the gap 17, the valve 11 moves rearward and the opening 25a in the side wall of the small diameter piston chamber 10a of the passage 25 becomes open. There is.

Next, the operation will be explained. FIG. 1 shows the normal state. That is, when the solenoid valve 21 is closed, the valve 11 is urged forward by the compression spring 16, and the opening 25a of the passage 25 is closed to the small diameter valve 11.
It shows a state where it is blocked by a.

The operation until the mold release agent is sprayed is as follows. When the solenoid valve 21 is opened in response to an external signal, pressurized air is introduced into the gap 17 through the passage 22 and pushes the valve 11 backward against the compression spring 16. This allows passage 25
The opening 25a is in an open state. Further, the pressurized air introduced into the gap 17 at this time enters the chamber 7 through the passage 23 and is ejected into the ejection port 4. Also aisle 2
Since the opening 25a of 5 is in the open state, the solenoid valve 2
The mold release agent that has passed through the passage 7 flows through the passage 26, the gap 36, the passage 25, the small-diameter piston chamber 10a, the passage 9, and the passage 8, and is jetted into the spout 4 from the protrusion 6c. The mold release agent ejected into the ejection port 4 is ejected from the chamber 7 through the gap into the ejection port 4, and is suctioned and agitated by the air flow that rapidly expands under pressure and becomes atomized, and is released into the ejection port 4 while remaining in a mist state. It is ejected from.

At this time, from the passage 26 through the gap 35, the passage 25
The mold release agent flowing to the blade 32c of the rotating rotor 32
Pressure is applied to rotate the rotor 32. That is, the rotor 32 continues to rotate as the release agent flows, and a number of blades 32c pass in front of the sensor 33, and the number of blades 32c passing through is counted by the sensor 33. If the number of sheets passed by the blade 32c within a predetermined unit time when the flow rate of the mold release agent is an appropriate amount is n (natural number), when the flow rate is larger than the appropriate amount, the pressure applied to the blade 32c increases, so the number of sheets passed is larger than n, and when the amount of circulation is less than the metered amount, the number of sheets passing through is smaller than n. Therefore, by counting the number of sheets that have passed, it is possible to detect whether the flow rate of the release agent, that is, the spray rate is appropriate.

(Effects of the Invention) As described above, according to the atomizer device of the present invention, the rotating rotor 32 having a plurality of blades 32c is connected to a separating agent that flows from the fourth releasing agent path 26 to the third releasing agent path 25 in the device. The blades 32c are provided to rotate under pressure by the molding agent, and the sensor 33 counts the number of blades 32c that pass through one predetermined location due to the rotation of the rotating rotor 32.
It is possible to constantly detect whether the amount of mold release agent sprayed is appropriate. Moreover, it can be detected reliably. For example, if a flow meter is attached to the mold release agent piping outside the atomizer device to detect the flow rate of the mold release agent, there is a possibility that the mold release agent may become clogged at the end of the external piping. However, in the present invention, the fourth mold release agent passage 26 and the third mold release agent passage 25 in the device are A rotating rotor 32 is provided between the passage 26 and the passage 2.
Since the flow rate to 5 is detected, even if the mold release agent becomes clogged at the end of the external piping, this can be detected and the amount of mold release agent sprayed can be adjusted to an appropriate level. It is possible to reliably detect whether or not this is the case. In addition, the rotating rotor 32 and the sensor 33
Since it is provided integrally with the holder 1 by the rotor case 30, the piping structure does not become complicated, as is the case, for example, when installing a flow meter in external piping.

Therefore, by using such an atomizer device, it is possible to prevent the production of defective die-cast products by, for example, stopping the operation of the device when the amount of mold release agent sprayed is not appropriate. Particularly when installing, for example, 4 to 10 atomizer devices at the tip of a robot arm and spraying mold release agent unattended, it is necessary to send an alarm signal, etc. when the flow rate of mold release agent is not appropriate. If the machine is activated to stop the work, the work can be carried out unattended without worrying about the production of defective products.

(Another Embodiment) Instead of the sensor 33, a tachometer may be installed directly on the rotating shaft 32b.

[Brief explanation of the drawing]

1 is a longitudinal cross-sectional view of an atomizer device according to the present invention, FIG. 2 is a cross-sectional view taken from FIG. 1, FIG. 3 is a top view of the device, and FIG. 25...Third release agent passage, 26...Fourth release agent passage, 32...Rotating rotor, 32c...Blade,
33...Sensor.

Claims (1)

[Claims] 1. An atomizer that includes a mold release agent passage and a pressurized air passage in the device, and mixes the mold release agent from the mold release agent passage with pressurized air from the pressurized air passage to eject a mist of mold release agent. In the device, a rotating rotor having a plurality of blades is installed in the mold release agent path in the device so that the blades rotate under pressure from the mold release agent passing through the mold release agent path, and the rotation speed of the rotating rotor is detected. An atomizer device characterized by being equipped with a rotation sensor.